The Morgan County sheriff's office says one woman was taken to a hospital after she was found walking down the road away from the fire and carrying her dog. Her condition is not known. Authorities also say two homes were damaged in Homer Township near Glouster.
People up to 12 miles away felt the explosion and heard the roar of the fire, which was reported around 8:30 a.m.
Houston-based Tennessee Gas Pipeline Co. says it was a rupture in its interstate natural gas transmission line. Company spokesman Richard Wheatley says a team has isolated the pipeline segment involved and shut the gas off.
The cause is not yet known.